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)(11,16)(12,14)(13,15)(17,18,22,24)(19,23,27,28)(20,25,30,32)(21,26,31,29)(33,34,39,42)(35,37,40,45)(36,38,41,47)(43,44,46,48)(2,4)(3,10)(8,12)(11,13)(17,19)(18,23)(20,29)(21,25)(22,27)(24,28)(26,30)(31,32)(33,35,39,40)(34,37,42,45)(36,43,41,46)(38,44,47,48)(2,4)(7,9)(8,12)(15,16)(18,24)(19,27)(25,32)(26,29)(35,40)(37,45)(43,46)(44,48) involution — undirected(1,3,6,10)(2,7,4,9)(5,13,14,11)(8,16,12,15)(17,20,22,30)(18,25,24,32)(19,26,27,29)(21,23,31,28)(33,36)(34,38)(35,43)(37,44)(39,41)(40,46)(42,47)(45,48)(1,4,6,2)(3,9,10,7)(5,12,14,8)(11,16,13,15)(17,18)(19,28)(20,25)(21,26)(22,24)(23,27)(29,31)(30,32)(33,37,39,45)(34,40,42,35)(36,44,41,48)(38,46,47,43)(1,5,6,14)(2,8,4,12)(3,11,10,13)(7,15,9,16)(17,21)(18,26)(19,25)(20,28)(22,31)(23,30)(24,29)(27,32)(33,38)(34,41)(35,44)(36,42)(37,46)(39,47)(40,48)(43,45)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.