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