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