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