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