I'm trying to find the id for a cyber man but I cant seem to find one

Hi, 

You can check their ID's in singleplayer when you do "/summon thedaldekmod:" you shall see a whole list with The Dalek Mod entities.

When you use the entity manipulator just start with thedalekmod:cybermen, if you want to show for example a Vex just do minecraft:vex.

Hope this helped you out a bit, if not feel free to reply on here. 

~Zel