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