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