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