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