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