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