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