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