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