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