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