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