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