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