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