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