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