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