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