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