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