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