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