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