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