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