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