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