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