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