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