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