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