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