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