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