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