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