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