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