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