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)(17,21,28,36)(23,31,29,37)(24,32,40,43)(26,34,30,38)(39,42,41,44)(5,6)(7,10)(8,9)(11,12)(15,23)(16,26)(17,28)(19,31)(20,34)(21,36)(25,29)(27,30)(33,37)(35,38)(39,41)(42,44) involution — undirected(2,4)(6,9)(10,11)(13,15,18,25)(14,19,22,33)(16,24,27,40)(17,29,28,23)(20,32,35,43)(21,37,36,31)(26,39,30,41)(34,42,38,44)(5,7,8,12)(6,10,9,11)(16,27)(20,35)(24,40)(26,30)(32,43)(34,38)(39,41)(42,44)(13,16,18,27)(14,20,22,35)(15,24,25,40)(17,30,28,26)(19,32,33,43)(21,38,36,34)(23,39,29,41)(31,42,37,44)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.