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