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