One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,7)(5,8)(9,13)(10,12)(11,14)(15,16)(17,18)(19,27)(20,24)(21,33)(22,26)(23,29)(25,36)(28,44)(30,42)(31,40)(32,43)(34,38)(35,41)(37,47)(39,46)(45,48) involution — undirected(1,3)(2,6)(4,9)(5,10)(7,13)(8,12)(11,15)(14,16)(17,19,22,30)(18,23,26,38)(20,28,31,45)(21,34,36,29)(24,39,40,37)(25,42,33,27)(32,47,35,46)(41,48,43,44)(6,12)(13,16)(17,20,22,31)(18,24,26,40)(19,28,30,45)(21,35,36,32)(23,37,38,39)(25,43,33,41)(27,44,42,48)(29,47,34,46)(1,4,5,11)(2,7,8,14)(3,9,10,15)(6,13,12,16)(20,31)(24,40)(28,45)(32,35)(37,39)(41,43)(44,48)(46,47)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.