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