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