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