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