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