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