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