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