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