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