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