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