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