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