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