How I think Shockwave might look like in cybertronian form if he was in the movie. And those who have seen the Dark of the Moon Shockwave, I know this looks nothing like him, it's just my version.
About this creation
What I think his theme should be: http://www.youtube.com/watch?v=GEEnN_E492c&feature=related (Drawn to Life: TNC Wilfre theme)
So, this version of Shockwave is very silent. If he talks, it's probably about your death. While on Cybertron, Shockwave learned how to control the Decepticon station on Cybertron by mind. (He can close the doors with his mind, turn the veiwscreen on with his mind, etc.) He also has the power to float (learned while learning psychic powers) which is very helpful in some occasions. Shockwave now awaits on Cybertron to this day.
Quoting Seth Higgins
I like it the only thing I would like to see is for him to have some ears and a vehicle mode.
Well, I have no idea how I could have made the ears, and as the vehicle mode, I forgot to mention that he never really developed a vehicle mode, mostly because he almost spent every second in his control room.