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