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