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