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