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