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