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