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