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