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