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