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)(19,27)(20,32)(21,35)(22,26)(23,30)(24,33)(25,28)(29,43)(31,39)(34,46)(36,41)(37,45)(38,42)(40,44)(47,48) involution — undirected(1,3)(2,7)(4,12)(5,13)(6,14)(8,16)(9,11)(10,15)(17,19,28,41,22,31,21,30)(18,23,35,39,26,36,25,27)(20,29,42,48,34,45,33,44)(24,37,46,47,38,43,32,40)(2,8)(4,6)(7,15)(9,10)(11,16)(12,14)(23,36)(27,39)(37,43)(40,47) involution — undirected(1,4,5,6)(2,8,9,10)(3,12,13,14)(7,16,11,15)(17,20,28,42,22,34,21,33)(18,24,35,46,26,38,25,32)(19,29,41,48,31,45,30,44)(23,37,39,47,36,43,27,40)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.