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