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