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