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