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