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