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