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