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