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