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