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