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