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