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