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