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