One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,5)(7,8)(17,18,23,27,24,28,22,26)(19,29,25,32,30,20,31,21)(9,10,13,16)(11,15,12,14)(17,19,24,30)(18,21,28,32)(20,26,29,27)(22,25,23,31)(2,5)(6,8)(9,11,13,12)(10,14,16,15)(17,20,24,29)(18,25,28,31)(19,27,30,26)(21,22,32,23)(9,12,13,11)(10,15,16,14)(17,21)(18,19)(20,22)(23,29)(24,32)(25,27)(26,31)(28,30)(1,3,4,7)(2,6,5,8)(17,22,24,23)(18,26,28,27)(19,25,30,31)(20,21,29,32)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.