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