If you'd like to see more examples of diagrams and The Crying of Lot 49, check out this text:
Writing Pynchon: Strategies in Fictional Analysis, by Alec McHoul and David Willis (1990, University of Illinois Press).
McHoul and Willis do a lot of diagramming of Lot 49 as it relates to other Pynchon works, especially on the topic of "excluded middles."