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