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