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