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