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