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