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