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