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