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