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