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