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