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)(17,18,20,25,21,23,22,26)(19,27,30,24,29,32,28,31)(1,2)(3,4)(9,11)(10,14)(12,15)(13,16)(18,23)(24,31)(25,26)(27,32) involution — undirected(2,4)(9,12,13,10)(11,15,16,14)(17,19)(18,24)(20,28)(21,29)(22,30)(23,31)(25,27)(26,32)(6,8)(11,16)(14,15)(17,20,21,22)(18,25,23,26)(19,28,29,30)(24,27,31,32)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.