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