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