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