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