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