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