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