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)(10,13)(11,14)(15,16)(17,18,22,26)(19,24,20,23)(21,25,29,32)(27,31,28,30)(33,34)(35,42)(36,39)(37,45)(38,41)(40,46)(43,47)(44,48)(2,3)(7,9)(8,10)(14,15)(17,18)(19,23)(20,24)(21,25)(22,26)(27,30)(28,31)(29,32)(33,34)(35,42)(36,39)(37,40)(38,41)(43,48)(44,47)(45,46) involution — undirected(5,13)(8,10)(11,16)(14,15)(17,19,22,20)(18,23,26,24)(21,28,29,27)(25,31,32,30)(33,35,38,36)(34,39,41,42)(37,43,46,44)(40,47,45,48)(1,3,6,2)(4,9,12,7)(5,10,13,8)(11,15,16,14)(17,20,22,19)(18,24,26,23)(21,28,29,27)(25,31,32,30)(33,36,38,35)(34,39,41,42)(37,44,46,43)(40,47,45,48)(1,4,6,12)(2,7,3,9)(5,11,13,16)(8,14,10,15)(17,18)(19,23)(20,24)(21,25)(22,26)(27,30)(28,31)(29,32)(33,37,38,46)(34,40,41,45)(35,43,36,44)(39,47,42,48)(1,5,6,13)(2,8,3,10)(4,11,12,16)(7,14,9,15)(17,21,22,29)(18,25,26,32)(19,27,20,28)(23,30,24,31)(33,34)(35,42)(36,39)(37,40)(38,41)(43,48)(44,47)(45,46)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.