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