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