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