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