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