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