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