One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,4)(6,9)(10,11)(13,14)(15,23)(16,27)(17,21)(18,32)(19,25)(20,30)(22,31)(24,39)(26,35)(28,42)(29,41)(33,37)(34,44)(36,43)(38,40) involution — undirected(5,6,8,9)(7,11,12,10)(13,15,18,33,17,25,31,26)(14,19,32,35,21,23,22,37)(16,28,43,44,29,24,30,40)(20,34,27,39,36,38,41,42)(13,16,18,30,17,29,31,43)(14,20,22,27,21,36,32,41)(15,24,26,40,25,28,33,44)(19,34,35,42,23,38,37,39)(2,4)(5,7,8,12)(6,10,9,11)(15,25)(19,23)(24,28)(26,33)(34,38)(35,37)(39,42)(40,44)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.