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