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