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