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