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)(17,18,24,26)(19,22,21,23)(20,28,32,27)(25,30,29,31)(1,3,5,4)(2,6,8,7)(9,10)(11,14)(12,13)(15,16)(17,19)(18,22)(20,29)(21,24)(23,26)(25,32)(27,30)(28,31)(10,13)(14,15)(17,20,23,31,24,32,22,30)(18,25,21,28,26,29,19,27)(9,11,12,16)(10,14,13,15)(17,21,23,26,24,19,22,18)(20,28,31,29,32,27,30,25)(1,4,5,3)(2,7,8,6)(17,22,24,23)(18,21,26,19)(20,30,32,31)(25,28,29,27)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.