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