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