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