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