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