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