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