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