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)(17,18,21,22)(19,25,26,23)(20,28,30,24)(27,31,29,32)(2,6)(7,8)(9,11)(10,13)(12,16)(14,15)(18,22)(19,26)(20,24)(27,32)(28,30)(29,31) involution — undirected(1,3,5,4)(2,7,6,8)(10,14)(11,16)(17,19)(18,23)(20,29)(21,26)(22,25)(24,32)(27,30)(28,31)(1,4,5,3)(2,8,6,7)(10,14)(13,15)(17,20)(18,24)(19,27)(21,30)(22,28)(23,31)(25,32)(26,29)(2,6)(7,8)(10,14)(13,15)(19,26)(20,30)(23,25)(24,28) 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.