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