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