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