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