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