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