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