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