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