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