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