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