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