There is some information on the Nightfly artwork in the Wikipedia entry:
https://en.wikipedia.org/wiki/The_Nightfly#Artwork. I always wondered why Fagen went to the trouble of creating the visuals of an early 60s radio studio, but only included a single record deck.
Nightfly is a technically interesting album - it was one of the first to be recorded and mixed in the digital domain, and was very bleeding edge in 1982.