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