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