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