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