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)(19,25)(20,21)(22,24)(23,29)(26,31)(27,30)(28,32)(33,34)(35,43)(36,46)(37,40)(38,42)(39,41)(44,47)(45,48) involution — undirected(1,3,7,4)(2,8,9,13)(5,14,15,11)(6,12,16,10)(17,19,22,29)(18,23,24,25)(20,27,26,32)(21,28,31,30)(33,35,40,39)(34,41,37,43)(36,45,38,44)(42,48,46,47)(2,9)(3,4)(10,12)(11,14)(18,24)(20,26)(23,25)(27,32)(33,36,40,38)(34,42,37,46)(35,44,39,45)(41,47,43,48)(1,4,7,3)(2,8,9,13)(5,14,15,11)(6,10,16,12)(17,20,22,26)(18,21,24,31)(19,27,29,32)(23,28,25,30)(33,37,40,34)(35,43,39,41)(36,42,38,46)(44,47,45,48)(1,5,7,15)(2,10,9,12)(3,11,4,14)(6,8,16,13)(17,19)(18,25)(20,27)(21,30)(22,29)(23,24)(26,32)(28,31)(33,38,40,36)(34,42,37,46)(35,45,39,44)(41,47,43,48)(1,6,7,16)(2,11,9,14)(3,12,4,10)(5,13,15,8)(17,21)(18,26)(19,28)(20,24)(22,31)(23,32)(25,27)(29,30)(33,39,40,35)(34,43,37,41)(36,45,38,44)(42,48,46,47)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.