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