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