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