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)(17,18,22,27)(19,28,29,43)(20,24,34,26)(21,35,36,39)(23,37,38,32)(25,30,42,33)(31,44,46,45)(40,47,41,48)(1,3)(2,7)(4,11)(5,13)(6,12)(8,15)(9,10)(14,16)(19,29)(23,38)(28,43)(31,46)(32,37)(40,41)(44,45)(47,48) involution — undirected(1,4,6,5)(2,8,9,14)(3,11,12,13)(7,15,10,16)(17,19,30,47,20,31,21,32,22,29,33,48,34,46,36,37)(18,23,39,44,26,41,25,28,27,38,35,45,24,40,42,43)(3,12)(7,10)(11,13)(15,16)(17,20,22,34)(18,24,27,26)(19,31,29,46)(21,33,36,30)(23,40,38,41)(25,39,42,35)(28,44,43,45)(32,48,37,47)(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.