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