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