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