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