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