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