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