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