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