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