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