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