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