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