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