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