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