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