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