Maybe find a youtube video that tries to give NTs "autism goggles" to see the world the way someone with ASD might? Then discuss the similarities and differences between the video and your personal set of symptoms?
Another thing that could help is writing out how a social scenario an NT would say is "simple" feels to someone with ASD who is masking. All the mental reminders to smile with your eyes crinkled and look at people's faces and don't flinch during hugs or handshakes and don't say "x," even though it's true and they ASKED about it, because what they want to hear is the formulaic response "y." Stuff like that. People don't know what it's like to have a hard time with something that comes "naturally" to them - they have no experience to pull from and relate to.
I think it's a little like how a white, straight, male, non-disabled human is less likely to understand how hard racism would be than a female - even a white female has experienced examples where she was considered inferior, stupid, beneath notice, etc. because of her appearance. I am NOT saying it's the same, just that it gives a point of commonality/reference from which to understand how racism might feel. A straight white guy probably doesn't have any first-hand experiences of being treated as incapable, lesser, etc. because of the way he was born, which makes it harder to imagine what that would be like for someone else.
NTs, especially extroverts in my experience, have a VERY hard time understanding social difficulties and other issues that come with ASD because they have little or no similar experiences to use to relate. You need to show them a scenario that reveals a piece of it to them.
For hypersensitivity issues, relating the noise or other stimuli that bother you to "fingernails on a chalkboard" usually helps. Almost every NT feels HIGHLY uncomfortable when they hear that sound.
Physical contact aversion is the main one I haven't found a good explanation for yet...most NTs take it personally when you don't want them to touch you in a socially appropriate way (i.e. refusing handshakes for acquaintances or refusing hugs from friends, etc.). The best I've been able to come up with is "I don't really like hugs, especially when they take me by surprise. Surprise touches actually scare me. I know that's weird, but please try to remember? And if you need a hug, feel free to ask because we are friends." That usually works for NT females. Men seem to have fewer "socially required hug" scenarios...lucky ducks.
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~AQ 32; not formally diagnosed.~