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