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