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