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