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