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