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