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