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