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