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