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