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