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