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