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