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