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