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