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