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