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