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