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