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