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