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