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