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)(17,18,24,19)(20,25,30,26)(21,22,23,27)(28,29,31,32)(1,3,4,8)(2,5,6,7)(9,11)(10,14)(12,15)(13,16)(17,19,23,27,24,18,21,22)(20,26,28,29,30,25,31,32)(2,6)(3,8)(9,12,13,10)(11,15,16,14)(17,20)(18,25)(19,26)(21,31)(22,32)(23,28)(24,30)(27,29)(2,6)(3,8)(11,16)(14,15)(17,21,24,23)(18,22,19,27)(20,28,30,31)(25,29,26,32)(2,6)(5,7)(17,22,23,19,24,27,21,18)(20,29,28,25,30,32,31,26)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.