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