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