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