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