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