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