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