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