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