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