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