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