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