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