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