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