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