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