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)(11,16,13,12)(17,18,23,24)(19,21,22,20)(26,30)(28,32)(1,3)(2,4)(5,8)(6,7)(9,11,14,13)(10,12,15,16)(17,19,23,22)(18,20,24,21)(26,30)(27,31)(2,6)(4,7)(10,15)(11,13)(17,20,23,21)(18,19,24,22)(25,26)(27,28)(29,30)(31,32)(1,3)(2,4)(5,8)(6,7)(9,12,14,16)(10,11,15,13)(17,21,23,20)(18,19,24,22)(25,27)(26,28)(29,31)(30,32)(1,4)(2,3)(5,7)(6,8)(9,13,14,11)(10,16,15,12)(17,22,23,19)(18,20,24,21)(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.