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