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)(31,40)(32,36)(34,43)(37,42) involution — undirected(5,6)(7,10)(8,9)(11,12)(13,15,18,26,19,27,17,32)(14,20,22,24,23,36,33,35)(16,28,29,42,31,25,30,43)(21,37,39,44,40,34,38,41)(2,4)(6,9)(10,12)(13,16)(14,21)(15,25)(17,30)(18,29)(19,31)(20,34)(22,39)(23,40)(24,41)(26,43)(27,28)(32,42)(33,38)(35,44)(36,37) involution — undirected(5,7)(6,10)(8,11)(9,12)(13,17,19,18)(14,22,23,33)(15,26,27,32)(16,29,31,30)(20,35,36,24)(21,38,40,39)(25,42,28,43)(34,41,37,44)(7,11)(10,12)(13,17,19,18)(14,22,23,33)(15,26,27,32)(16,30,31,29)(20,35,36,24)(21,39,40,38)(25,43,28,42)(34,44,37,41)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.