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