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