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