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