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