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