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