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