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