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