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