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