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