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