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