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