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