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