I wish there were CGI renders available; for some reason I'd really like to contrast it with the toy (which is odd, because I plan to get Jolt's figure regardless).
I think the best way to see is to see the movie, (that said he only makes fleeting appearances) try searching for the high res pictures of the bots that have been surfacing recently.
This is all we've got (images enhanced by me): FAB, RPM, Deluxe. Sadly, I don't think his face/head even looks like this in the movie. He clearly doesn't have his middle horn the few times we see him. These are probably based on early concept images of him.