God is visible in the person of Jesus Christ, though I can’t exactly point to where Jesus is now, of course.
If we’re talking about the divine nature in itself, the Trinity – Father, Son, and Holy Ghost as God – and not considering the Incarnation, then it must be said that God is invisible. He has no parts or extension in space, though at the same time it can also be said that He is present and “in contact” with all things insofar as He is the cause of their being. The Divine Substance is not something that can be physically seen.