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