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