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