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