I don't "see" God when I pray as much as I sense Him and His presence with me.
I have some general picture of Him in my head, I guess you could say, as my Father sitting on His throne, or Jesus as I picture Him to be. But those, I know, are nowhere close to reality, because seeing God means to be in awe of His glory and majesty, and so whichever glimpse that we get of Him now isn't going to be anything compared to His full glory. No one can see God and live. No flesh can stand in His presence, never mind glory in it. It is only because of the Holy Spirit's gentle touch, and Him holding back His full glory that we can even stand the bit of whatever Presence we get to sense. If God was to really let loose upon our unsuspecting bodies, I think we would die in an instance. And so whichever glimpse we get now ought to be sufficient until that day ... that day when we see Him for who He really is, and how awesome that will be!