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