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