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