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