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