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