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