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