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