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