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