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