One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,5)(7,8)(9,10,12,14)(11,15,16,13)(17,18)(19,23)(20,25)(21,26)(22,30)(24,27)(28,31)(29,32)(2,5)(6,8)(17,19,23,18)(20,29,31,26)(21,28,32,25)(22,30,24,27)(9,11,12,16)(10,13,14,15)(17,20)(18,25)(19,28)(21,22)(23,31)(24,32)(26,30)(27,29)(17,21,23,32)(18,26,19,29)(20,22,31,24)(25,30,28,27)(1,3,4,7)(2,6,5,8)(17,22,23,24)(18,27,19,30)(20,21,31,32)(25,29,28,26)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.