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