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