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