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