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