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