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