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