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