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