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)(11,15)(12,14)(13,16)(17,18)(19,30)(20,22)(21,29)(23,28)(24,31)(25,27)(26,32) involution — undirected(9,11)(10,13)(12,16)(14,15)(17,19,23,31)(18,24,28,30)(20,26,27,29)(21,25,32,22)(2,5)(6,8)(10,14)(11,16)(17,20,21,24,23,27,32,30)(18,25,29,19,28,22,26,31)(1,3,4,7)(2,6,5,8)(10,14)(13,15)(17,21,23,32)(18,26,28,29)(19,25,31,22)(20,24,27,30)(17,22,32,19,23,25,21,31)(18,27,26,24,28,20,29,30)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.