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