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