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