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