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