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