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