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