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)(11,14)(12,15)(13,16)(17,18,22,25)(19,23,20,27)(21,24,29,31)(26,30,28,32)(9,11,14,10)(12,15,13,16)(19,26)(20,28)(21,29)(23,30)(24,31)(27,32)(2,5)(6,8)(9,12,14,13)(10,15,11,16)(17,19,22,20)(18,23,25,27)(21,28,29,26)(24,32,31,30)(1,3,4,7)(2,6,5,8)(9,13,14,12)(10,15,11,16)(17,20,22,19)(18,23,25,27)(21,26,29,28)(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.