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