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