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)(17,18,22,21)(19,25,27,23)(20,24,28,30)(26,32,29,31)(35,42)(37,39)(43,45)(46,48)(1,3)(2,6)(4,11)(5,10)(7,9)(8,14)(12,15)(13,16)(17,19)(18,23)(20,26)(21,25)(22,27)(24,31)(28,29)(30,32)(33,34)(35,37)(36,44)(38,41)(39,42)(40,47)(43,46)(45,48) involution — undirected(3,10)(6,7)(11,16)(14,15)(20,28)(24,30)(26,29)(31,32)(33,35,38,42)(34,39,41,37)(36,43,47,45)(40,46,44,48)(1,3)(2,7)(4,11)(5,10)(6,9)(8,15)(12,14)(13,16)(17,20,22,28)(18,24,21,30)(19,26,27,29)(23,31,25,32)(33,35)(34,37)(36,45)(38,42)(39,41)(40,46)(43,47)(44,48)(1,2)(3,6)(4,12)(5,9)(7,10)(8,13)(11,15)(14,16)(17,19)(18,25)(20,29)(21,23)(22,27)(24,31)(26,28)(30,32)(33,36)(34,40)(35,43)(37,48)(38,47)(39,46)(41,44)(42,45) involution — undirected(1,4)(2,8)(3,11)(5,13)(6,14)(7,15)(9,12)(10,16)(17,21,22,18)(19,25,27,23)(20,30,28,24)(26,32,29,31)(33,37)(34,35)(36,46)(38,39)(40,45)(41,42)(43,44)(47,48)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.