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