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