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