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