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