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