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