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