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