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