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