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