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