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