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