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