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