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