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