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