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