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