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