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