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