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