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