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