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