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