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