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