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