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