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