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