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