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