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