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