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