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