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