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