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