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)(17,18,23,20)(19,24,21,25)(22,26,32,30)(27,28,31,29)(1,3,5,4)(2,6,7,8)(17,19,23,21)(18,24,20,25)(22,28,32,29)(26,31,30,27)(10,13)(14,16)(17,20,23,18)(19,27,21,31)(22,26,32,30)(24,28,25,29)(9,11,12,15)(10,14,13,16)(17,21,23,19)(18,25,20,24)(22,29,32,28)(26,27,30,31)(1,4,5,3)(2,6,7,8)(19,28)(21,29)(22,32)(24,31)(25,27)(26,30)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.