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