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)(15,21)(16,29)(17,31)(18,24)(19,23)(20,25)(22,34)(26,42)(27,37)(28,38)(30,36)(32,44)(33,41)(35,40)(39,43) involution — undirected(1,2,4,3)(6,9)(10,12)(13,15)(14,21)(16,19)(17,32)(18,27)(20,28)(22,39)(23,29)(24,37)(25,38)(26,35)(30,33)(31,44)(34,43)(36,41)(40,42)(1,3,4,2)(13,16,18,15,20,27,19,28)(14,21,23,29,25,38,24,37)(17,30,33,26,35,43,34,32)(22,36,40,44,41,39,31,42)(5,7,8,11)(6,10,9,12)(13,17,18,33,20,35,19,34)(14,22,23,40,25,41,24,31)(15,26,27,43,28,32,16,30)(21,36,29,44,38,39,37,42)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.