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