Ange Albertini's work on collisions is pretty great and he makes lots of example images and illustrations.

https://corkami.github.io/

In particular he works on/with the PoC||GTFO team and is responsible for the MD5 collision cover art in a past issue:

https://github.com/angea/pocorgtfo

For SHA-1 (and others) you might find more at his github project:

https://github.com/corkami/collisions

hth,

adric