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