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