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