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