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