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