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)(22,28)(23,30)(24,29)(25,32)(26,38)(31,47)(33,42)(35,44)(36,41)(37,46)(39,45)(43,48) involution — undirected(2,6)(7,8)(9,10)(11,14)(12,13)(15,16)(17,19,22,32)(18,25,28,27)(20,35,37,36)(21,24,33,23)(26,43,45,47)(29,40,30,42)(31,39,48,38)(34,41,46,44)(1,3,5,4)(2,7,6,8)(10,13)(14,15)(17,20,23,38,22,37,24,39)(18,26,29,34,28,45,30,46)(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)(17,21,24,32,22,33,23,19)(18,27,30,42,28,25,29,40)(20,36,39,48,37,35,38,31)(26,44,46,43,45,41,34,47)(1,4,5,3)(2,7,6,8)(18,28)(20,37)(25,27)(29,30)(31,48)(35,36)(38,39)(40,42)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.