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