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