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