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