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