One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,6)(5,8)(9,10)(11,13)(12,14)(15,16)(17,18,24,23)(19,21,25,31)(20,22,26,32)(27,30,29,28)(1,3,5,4)(2,6,8,7)(9,11,12,15)(10,13,14,16)(17,19,24,25)(18,21,23,31)(20,28,26,30)(22,27,32,29)(1,3,5,4)(2,7,8,6)(10,14)(13,16)(17,20)(18,22)(19,27)(21,30)(23,32)(24,26)(25,29)(28,31)(1,4,5,3)(2,6,8,7)(17,21,24,31)(18,25,23,19)(20,29,26,27)(22,28,32,30)(17,22,24,32)(18,26,23,20)(19,28,25,30)(21,27,31,29)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.