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