One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,6)(3,7,4,8)(17,18,22,27)(19,23,30,38)(20,25,32,42)(21,24,34,26)(28,36,31,40)(29,35,44,37)(33,39,46,41)(43,47,45,48)(2,6)(7,8)(9,10)(11,14)(12,13)(15,16)(17,19,22,30)(18,23,27,38)(20,31,32,28)(21,29,34,44)(24,35,26,37)(25,40,42,36)(33,45,46,43)(39,48,41,47)(10,13)(11,15)(18,24)(20,32)(21,34)(23,35)(25,41)(26,27)(28,31)(29,44)(36,48)(37,38)(39,42)(40,47) involution — undirected(1,3,5,4)(2,7,6,8)(9,11,12,15)(10,14,13,16)(17,20,22,32)(18,25,27,42)(19,28,30,31)(21,33,34,46)(23,36,38,40)(24,39,26,41)(29,43,44,45)(35,47,37,48)(1,4,5,3)(2,8,6,7)(10,13)(14,16)(20,32)(25,42)(28,31)(33,46)(36,40)(39,41)(43,45)(47,48)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.