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