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)(11,13)(12,14)(15,16)(17,18,22,26)(19,23,27,28)(20,29,31,24)(21,25,32,30)(1,3,5,4)(2,6,8,7)(9,11)(10,13)(12,15)(14,16)(17,19,22,27)(18,23,26,28)(20,30,31,25)(21,24,32,29)(1,3,5,4)(2,7,8,6)(10,14)(11,15)(17,20,22,31)(18,24,26,29)(19,25,27,30)(21,28,32,23)(1,4,5,3)(2,6,8,7)(10,14)(13,16)(17,21,26,30,22,32,18,25)(19,20,23,29,27,31,28,24)(2,8)(6,7)(17,18,22,26)(19,23,27,28)(20,29,31,24)(21,25,32,30)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.