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