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