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