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