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