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