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