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