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