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