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