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)(11,14)(12,15)(13,16)(17,18,21,25)(19,23,28,31)(20,24,22,26)(27,29,32,30)(2,5)(6,8)(9,11,13,12)(10,14,16,15)(17,19)(18,23)(20,29)(21,28)(22,30)(24,32)(25,31)(26,27)(9,11,13,12)(10,15,16,14)(17,18)(19,27)(20,26)(21,25)(22,24)(23,30)(28,32)(29,31)(9,12,13,11)(10,15,16,14)(17,20)(18,24)(21,22)(25,26)(27,32)(29,30)(1,3,4,7)(2,6,5,8)(18,25)(23,31)(24,26)(27,32)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.