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