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