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