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