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