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