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