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