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