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