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