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