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