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