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