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