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