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)(15,24)(16,28)(17,22)(18,23)(19,33)(20,27)(21,31)(25,39)(26,36)(29,37)(30,43)(32,35)(34,44)(38,40)(41,42)(1,2,4,3)(5,6)(7,10)(8,9)(11,12)(13,15)(14,20)(16,25)(17,32)(18,27)(19,26)(21,34)(22,36)(23,24)(28,42)(29,44)(30,41)(31,40)(33,35)(37,38)(39,43)(1,3,4,2)(13,16,19,31,18,30,17,29)(14,21,22,28,23,37,33,43)(15,25,26,40,27,41,32,44)(20,34,36,42,24,38,35,39)(6,9)(10,12)(13,17,18,19)(14,22,23,33)(15,26,27,32)(16,29,30,31)(20,35,24,36)(21,28,37,43)(25,40,41,44)(34,39,38,42)(5,7,8,11)(6,10,9,12)(14,23)(15,27)(16,30)(22,33)(26,32)(29,31)(34,38)(39,42)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.