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