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