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