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