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