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