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