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