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