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