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