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