No... there is no caster class.... at least not in the sense of wizards with combat spells slinging fireballs...
Technology of Cyberpunk is forseeable and believable in relation to the technology of today... even the wierder stuff has grounding in reality...
If you want something that fires electric bolts... well, get yourself a taser... or maybe an EMP rifle (if you can get your hands on one, good luck with that btw)
But anything of the sort is still going to use the related weapon skill.
The closest thing available, and the cyberpunk equivalent of a wizard, is the netrunner, but all his "casting" takes place in the digital realm" where he can set up his avatar to look like a wizard if he really wants, but but his casting is going to be the equivalent of adding video game graphics to his hacking abilities (which the original game rules supported at least in description, but they are pretty much unplayable).... of course the only people able to see your "csdting effects" are going to be the ones jacked in to the computer spectating... which means maybe the bored techie or medtechie, while the rest of the classes actually do all the real work and accuse you of playing video games while they were risking their lives...