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