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