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