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