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