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