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