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