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