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