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