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