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