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