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