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