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