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