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