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)(11,13)(12,14)(15,16)(17,18)(19,28)(20,31)(21,24)(22,26)(23,37)(25,33)(27,36)(29,43)(30,39)(32,46)(34,45)(35,42)(38,48)(40,44)(41,47) involution — undirected(2,6)(7,8)(9,11)(10,13)(12,15)(14,16)(17,19)(18,24)(20,29)(21,22)(23,30)(25,38)(26,28)(27,39)(31,45)(32,34)(33,44)(35,36)(37,42)(40,41)(43,46)(47,48) involution — undirected(1,3,5,4)(2,7,6,8)(11,15)(13,16)(17,20,23,33,22,32,36,47)(18,25,27,31,26,41,37,46)(19,29,30,44,21,34,35,48)(24,38,39,45,28,40,42,43)(11,15)(13,16)(17,21,22,19)(18,24,26,28)(20,29,32,34)(23,35,36,30)(25,40,41,38)(27,39,37,42)(31,43,46,45)(33,44,47,48)(1,4,5,3)(2,8,6,7)(10,14)(13,16)(19,21)(20,32)(24,28)(25,41)(30,35)(31,46)(33,47)(39,42)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.