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