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