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