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