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