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