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