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