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