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)(17,18)(19,27)(20,30)(21,23)(22,26)(24,28)(25,31)(29,32) involution — undirected(1,2,4,5)(3,6,7,8)(9,11,12,16)(10,13,14,15)(18,23)(19,20)(22,29)(24,30)(25,27)(28,31)(10,14)(13,15)(17,19,21,28)(18,24,23,27)(20,22,31,29)(25,26,30,32)(1,3,4,7)(2,6,5,8)(10,14)(13,15)(18,23)(19,28)(20,31)(26,32)(2,5)(6,8)(11,16)(13,15)(17,20,21,31)(18,25,23,30)(19,29,28,22)(24,32,27,26)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.