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