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