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