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