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)(19,20,25,28,27,23,30,31)(1,2)(3,6)(4,5)(7,8)(9,11,12,15)(10,13,14,16)(17,19,21,27)(18,20,24,23)(22,25,29,30)(26,28,32,31)(10,14)(13,16)(17,19)(18,23)(20,24)(21,27)(22,25)(26,31)(28,32)(29,30) involution — undirected(2,5)(6,8)(18,24)(19,27)(25,30)(26,32) involution — undirected(1,3,4,7)(2,6,5,8)(17,20,22,28,21,23,29,31)(18,25,26,27,24,30,32,19)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.