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