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