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)(19,27)(20,23)(21,30)(22,24)(25,29)(26,31)(28,32)(1,3,4,7)(2,5,6,8)(9,11)(10,13)(12,15)(14,16)(17,19,22,28)(18,23,24,25)(20,21,29,31)(26,32,30,27)(2,6)(5,8)(11,15)(13,16)(18,24)(23,25)(26,30)(27,32) involution — undirected(17,20,21,28,22,29,31,19)(18,25,26,32,24,23,30,27)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.