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