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