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