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