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