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