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