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