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