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