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)(19,23)(22,24)(25,26)(27,31)(28,32)(29,30) involution — undirected(2,3)(6,7)(10,15)(11,12)(26,30)(28,31) involution — undirected(1,2,5,3)(4,6,8,7)(9,11,14,12)(10,16,15,13)(17,18,21,20)(19,22,23,24)(25,27,29,32)(26,31,30,28)(1,3,5,2)(4,7,8,6)(9,12,14,11)(10,13,15,16)(17,19,21,23)(18,22,20,24)(25,28)(26,27)(29,31)(30,32)(1,4)(2,6)(3,7)(5,8)(9,13)(10,12)(11,15)(14,16)(17,20,21,18)(19,24,23,22)(25,27)(26,31)(28,30)(29,32)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.