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