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