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