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