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