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