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