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