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