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