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