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