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