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