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