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