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)(19,24,25,20)(21,26,29,30)(27,31,32,28)(10,14)(15,16)(18,23)(19,25)(21,29)(28,31) involution — undirected(1,2,4,3)(9,10,13,14)(11,15,12,16)(17,19)(18,24)(20,23)(21,27)(22,25)(26,31)(28,30)(29,32)(5,6)(7,8)(9,11,13,12)(10,15,14,16)(17,20,22,24)(18,25,23,19)(21,28,29,31)(26,32,30,27)(1,3,4,2)(9,12,13,11)(10,16,14,15)(17,21)(18,26)(19,27)(20,28)(22,29)(23,30)(24,31)(25,32)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.