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