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