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