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