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