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