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