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