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