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