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