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