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