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