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