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