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