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