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