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