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