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