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