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