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