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