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