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