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