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