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