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