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