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