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