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