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